I got into gaming 2003/2004 so I haven't played many games from before that.
Halo: CE truly got me into gaming and since it was pretty much the only one I had for a while I'd play it over and over again (although I only actually completed it around 2006/2007 because I somehow could never get past the level where you first meet the flood and I eventually gave up until some friends showed me what way to go).
Pokemon Diamond (the classic Pokemon generations were, again, before my time) was probably the most addictive game I'd ever played. The older ones seem ok but maybe to appreciate them as much as people do you would have had to have been there when they first came out. Diamond had more in it on a basic level.
Fallout 3, AC:II and Mass Effect 2 are probably my favourite games for my 360. Probably for the immersion.
I can't really narrow it down more than that.
Quite mainstream games then.
Halo: CE truly got me into gaming and since it was pretty much the only one I had for a while I'd play it over and over again (although I only actually completed it around 2006/2007 because I somehow could never get past the level where you first meet the flood and I eventually gave up until some friends showed me what way to go).
Pokemon Diamond (the classic Pokemon generations were, again, before my time) was probably the most addictive game I'd ever played. The older ones seem ok but maybe to appreciate them as much as people do you would have had to have been there when they first came out. Diamond had more in it on a basic level.
Fallout 3, AC:II and Mass Effect 2 are probably my favourite games for my 360. Probably for the immersion.
I can't really narrow it down more than that.
Quite mainstream games then.